I like quality and proper build parts but as almost everybody on this forum(i guess) i don´t have much money laying around, if i had i probably would be registered on a porsche owners club or ferrari or something...
I have to draw a line and make some shortcuts, and i try to make them were they matter the least... like gauges... on the essential parts i rather buy quality used than ebay...
Lets face it, how much time do you spend reading the gauges? And does it matter their a bit off? Do you tune your car on them? They´re there in 98% of the cases not for fine tuning but to warn you... the wideband yes, it really needs to be accurate, that one i bought from innovate, but the others are there for diagnostic porpuses and warning in case something goes wrong or you are running on higher/lower then normal temps, pressures, etc...
It´s for warning most of the time... even if the gauges didn´t have values on them, like many oem´s don´t, like the saab and volvo boost gauges, or water temp in almost every vehicle on the planet, you would know something´s up just by the needle position...
The wideband, boost and fuel pressure, are the only ones you need to be really accurate on our "amateur tuner" case...
If you are a professional tuner that´s another story... but if you are, are you gonna test your cars on the street?
I remenber a redline magazine test(uk) were they did a back to back boost gauge test, and the the most accurate was a cheap one... how long will it last is another story... but they all read about the same, there wasn´t much of a difference bettwen them... not significant...
Ok if you have the money buy quality ones... pretty sure they will be better... if not buy what you can afford... they don´t matter that much when your in attack mode, they will be usefull when you feel/hear something different...